Hardware installation
3.3 Use with a stand-alone system
PC Adapter USB A2
18 Operating Instructions, 07/2022, C79000-G8976-C293-03
Connecting the PC Adapter USB A2 to the PROFIBUS network
A maximum of 32 nodes can be connected to a PROFIBUS network segment. Several network
segments can be connected together using PROFIBUS repeaters to create a complet network
with a maximum of 127 nodes. The transmission speed in the PROFIBUS network is a
maximum of 12 Mbps.
The PC Adapter USB A2 supports transmission speeds up to maximum of 12 Mbps.
Do not insert any extension cords
No extension cord may be inserted in the connection between the PC Adapter USB A2 and
S7/M7/C7 system.
Removing the PC Adapter USB A2
You need to terminate existing communication (e.g. online diagnostics) before you
disconnect the PC Adapter USB A2 from your PC.
You must also deactivate the PC Adapter USB A2 in a secure manner before you disconnect it
from the PG/PC. To do this, click the "Safely Remove Hardware" icon in the taskbar notification
area.
3.3 Use with a stand-alone system
The following figure shows the connection to a single system (1 network node).
After successful installation of the PC Adapter USB A2 and configuration with the
configuration console "Communication Settings" or, alternatively, "Set PG/PC Interface", your
SIMATIC software package can communicate with the S7 automation system.
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